[sdiy] "tilt" circuit

John Marshall wa7bsr at gmail.com
Wed May 20 21:09:43 CEST 2020


There is a Quad designed tilt control published in Audio and Hi-Fi Handbook
published by Newnes.

On Wed, May 20, 2020 at 12:02 PM ColinMuirDorward <colindorward at gmail.com>
wrote:

> I breadboarded something I was calling a "wideband" BPF once, but didn't
> test it enough to know if it would be useful for tilt EQ type duties.
> Idea was to use different caps for the highpass and lowpass sections to
> spread out the cutoff points so that when the knob was turned to the right,
> the LP section was pushed into supersonic regions, and when turned left,
> the HP section was in subsonic regions.
> It's not really a tilt EQ, but similar in that it uses one knob to produce
> two filtering effects. Has anyone done this and found it useful?
>
> On Wed, May 20, 2020 at 11:43 AM David G Dixon <dixon at mail.ubc.ca> wrote:
>
>> Yes, actually, now that you mention it, it was from Self's book that I got
>> the tilt circuit I used.
>>
>> I was confused because I have used quite a few Rod Elliott circuits in
>> various modules.
>>
>>
>> -----Original Message-----
>> From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of Tom
>> Bugs
>> Sent: Wednesday, May 20, 2020 6:04 AM
>> To: synth-diy at synth-diy.org
>> Subject: Re: [sdiy] “tilt” circuit
>>
>> There's also a bit in Doug Self's Small Signal book - pages 269-271
>> Very slightly different circuit-wise -  he also terms it 'tone-balance'
>> or tilt.
>>
>> Best, Tom
>>
>> On 20/05/2020 13:35, Paul Perry wrote:
>> > Rod Elliott has this covered. Section 10 on this page:
>> > https://sound-au.com/articles/eq.htm
>> >
>> > paul perry Melbourne Australia
>> >
>> > ------ Original Message ------
>> > From: "ulfur hansson" <ulfurh at gmail.com>
>> > To: "synth-diy mailing list" <synth-diy at synth-diy.org>
>> > Sent: 20/05/2020 10:22:46 PM
>> > Subject: [sdiy] “tilt” circuit
>> >
>> >> hello list,
>> >>
>> >> i have been wanting to elaborate on a synth master output stage for a
>> while, and these strange times have cleared up space for prototyping
>> time...
>> >>
>> >> i have been thinking about a “tilt” circuit that could shift weight
>> between volume on a hipass and lowpass circuit, effectively making it
>> brighter or darker as you turn a single knob.
>> >>
>> >> of course an xfade with a hi/lopass derived from an svf could be the
>> answer, but it seems rather huge for a simple idea - are there any simpler
>> ways to achieve this that come to mind?
>> >>
>> >> hope you all are safe and well,
>> >> -ulfur
>> >>
>> >> Sent from outer space
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>
>
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